You applied for GST registration, and instead of an approval you got a REG-03. It is easy to read this as a rejection and panic. It is not. A REG-03 is the GST officer saying "I need one or two things cleared up before I approve you." Handle it correctly and your registration goes through in days. Handle it poorly, or ignore the clock, and the application is rejected and you start over.
This guide tells you exactly why REG-03 notices are issued, how to file the REG-04 reply, what to attach, and how to word it.
What REG-03 and REG-04 Actually Are
The registration flow has a simple logic. You apply, the officer reviews, and if anything is unclear the officer asks before deciding. Under Rule 9 of the CGST Rules:
- REG-01: your application. The officer examines it within 7 working days, or within 30 days where Aadhaar authentication was not done or the case is flagged for physical verification.
- REG-03: the officer's notice seeking clarification, information or documents.
- REG-04: your reply, due within 7 working days of receiving REG-03.
- REG-06 or REG-05: the approval certificate or the rejection order, due within 7 working days of your reply.
The single most important number here is 7 working days. That is your window to file REG-04 from the date the REG-03 lands. Working days, not calendar days, but do not gamble on the difference. Reply early.
The Common Reasons a REG-03 Is Issued
Almost every REG-03 traces back to a short list of fixable problems. Knowing them lets you pre-empt the query, or answer it cleanly.
- Premises proof: the electricity bill, tax receipt or rent agreement is missing, unreadable, old, or in someone else's name without a consent letter.
- Address mismatch: door number, pin code or locality differ between the application and the documents.
- Constitution documents: partnership deed, incorporation certificate or authorisation for the signatory is missing.
- Business activity: the HSN or SAC codes chosen do not match the described business.
- Identity or photo: Aadhaar authentication not done, or a photograph or signature that does not match.
In April 2025 the CBIC issued Instruction No. 03/2025-GST standardising the documents officers may demand and directing them not to raise presumptive or irrelevant queries during registration. If your REG-03 asks for something outside the prescribed list, you are within your rights to politely point this out in your REG-04 while still providing what is genuinely required.
How to File Your REG-04 Reply, Step by Step
You file REG-04 directly on the GST portal against the ARN of your application. You do not need a fresh login if you use the application-tracking route.
- Go to Services, Registration, Application for Filing Clarifications (or use the new registration route with your ARN).
- Select the ARN of the application that received REG-03.
- Type a short reply to each query raised.
- Upload the supporting documents as PDF or JPEG files.
- Sign with DSC or EVC and submit.
- Save the acknowledgement as proof that you replied within the deadline.
Supporting Documents to Keep Ready
Match the document to the query. Attaching the right proof is what gets a one-shot approval.
- Address and premises proof: latest electricity bill, property tax receipt, or municipal khata; rent or lease agreement if rented.
- Ownership or consent: a consent letter or NOC from the premises owner where the property is not in the applicant's name, on plain paper, signed.
- Identity: PAN and Aadhaar of the promoters, a recent passport-size photo, and proof of Aadhaar authentication.
- Constitution: partnership deed, certificate of incorporation, or registration certificate, as applicable to your entity.
- Bank proof: a cancelled cheque or the first page of the passbook, if asked.
Sample REG-04 Reply Formats
Keep replies short, factual, and tied to the attachment. Two examples.
Query: Principal place of business proof not satisfactory. Reply: "The registered premises are taken on rent. We attach the registered rent agreement dated [date] and the latest electricity bill in the owner's name, along with a signed consent letter from the owner permitting use of the premises for business. The address in all documents matches the address in the application."
Query: Nature of business activity unclear. Reply: "The business supplies [describe goods or services] under HSN/SAC code [code]. We attach a sample purchase invoice and our business description for reference. The activity is correctly reflected in the application."
Notice the pattern: state the fact, name the attached document, confirm consistency. No arguing, no padding.
What Happens After You File REG-04
Once you submit, the officer handles again and has 7 working days to act. Three outcomes are possible:
- Approved: the officer is satisfied and issues your GST registration certificate in FORM GST REG-06, with your GSTIN.
- Rejected: if the clarification is still inadequate, the application is rejected in FORM GST REG-05 with reasons. You can apply afresh, addressing the stated gaps.
- No reply filed: if you let the 7-day window lapse without filing REG-04, the officer can reject the application outright. This is the avoidable failure.
- No action by the officer: if the officer does not act within 7 working days of your reply, the registration is deemed approved under Rule 9(5).
The lesson is simple. A REG-03 is an opportunity to fix one or two things, not a verdict. Reply fast, reply specifically, and attach the exact proof for each query.
Sources: CGST Rules 2017, Rule 9 and Rule 10 (registration, clarification, and approval procedure); FORM GST REG-01, REG-03, REG-04, REG-05, and REG-06; CBIC Instruction No. 03/2025-GST dated April 2025 on processing of registration applications; the Application for Filing Clarifications facility on the GST portal (gst.gov.in). Timelines and document requirements are revised periodically, so confirm the current position on gst.gov.in or with a qualified professional before relying on this for a specific application. This article is general information and not advice on your specific case.
